---Someone is knocking at the door. Who may it be?---It ______ be Tom. He is still in the school.
He tries _____English well. And he practices _____English every day.
The meat is _____dear and eating ____meat is bad for your health.
Can you finish ____the book in about a week?
No one can make us _____ quiet because we are very excited.
When winter comes, the days get_______.